﻿//
//  Monkey Manager
//  Copyright (C) 2012 Victor Tereschenko
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
//     
// ========================================================================

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ManagerDB;

namespace MonkeyManager
{
    class RandomFileSource : IFileSource
    {
        IDatabase mDatabase;
        public RandomFileSource(IDatabase database, Filter filter)
        {
            mDatabase = database;
            mFilter = filter.Clone();
            mFilter.Limit = 1;
            mFilter.FileStatus = FileStatus.Present;
            mFilter.SortMode = SortMode.Random;
        }

        Filter mFilter;

        public StoredFile Next()
        {
            StoredFile[] files = mDatabase.Find(mFilter);
            if (files == null || files.Length == 0)
                return null;

            return files[0];
        }
    }
}
